which filesystem

[Michael Shiloh]

On 08/11/2012 12:28 PM, Nadav Har'El wrote:
> On Sat, Aug 11, 2012, Erez D wrote about "which filesystem":
>> hello
>>
>> i have and external USB hard-drive size 2TB, mounted as ext4. (ubuntu 10.10
>> amd64)
>> every time there is a power failure. i need to do a manual fsck on this
>> disk. and this takes around an hour ...
>
> I have a 2 TB disk with ext3, and I don't have anything close to the 1 hour
> boots you report (even one minute looks excessive).
>
> Both ext3 and ext4 are journalling filesystems, meaning that after power
> failures, only a relatively small "journal" of the last modifications
> needs to be replayed, rather than going through the entire disk.
>
> Is it possible your filesystem for some reason has journalling disabled,
> or improperly configured? Try "tune2fs -l" on your filesystem and look
> for suspicious parameters. Look at "Filesystem features" and verify
> there is "has_journal". See that it doesn't force a full fsck every time
> ("Maximum mount count" can very well be -1 and "check interval" 0).
>
>

Might also be the disk going bad - perhaps check with the S.M.A.R.T. 
utility smartmontools